Los Gatos-Monte Sereno police are asking for the public's help in identifying a man who punched a woman in the face for no apparent reason. The assault happened at around 4:30 p.m. Jan. 6 in the 14000 block of Blossom Hill Road, near the intersection of Harwood Road.

Witnesses say a man confronted a woman in a strip mall parking lot and struck her with a closed fist. They describe the suspect as African American, in his early to mid-twenties and between five feet, nine inches and six feet tall. He has a slender build and short brown hair. He was last seen wearing a white t-shirt, blue jeans and a white baseball cap that was on backwards.

Police are looking into the possibility that the assault may be a "knockout game" case, where assailants try to knock out unsuspecting victims with a single punch -- just for amusement.

There is no known motive for Monday's assault and police said that there is no evidence it was "knockout" related. They are investigating all possibilities.

Police did say they had received numerous calls from residents asking about the trend.

The woman was treated at the scene for minor injuries.

Anyone with information about the incident, or who may be able to identify the assailant, is asked to contact the police department at 408.354.8600.